Senior Systems & Network Engineer

We are seeking an experienced Senior Systems & Network Engineer for a six-month, full-time contract opportunity based onsite in Greenville, SC. This position requires 10 years of hands-on enterprise infrastructure experience, with particular emphasis on Windows Server administration and migrations, SQL Server clustering, VMware vSphere, Microsoft Azure, PowerShell scripting, and Active Directory Federation Services (ADFS).

This opportunity is ideal for a senior infrastructure engineer who enjoys solving complex technical challenges and contributing to enterprise infrastructure improvements. You'll work directly with infrastructure leadership and an established team of 5–7 systems and network engineers, supporting critical systems, potential modernization initiatives, and knowledge sharing across the team. We're looking for someone who can bring new ideas, technical expertise, and a hands-on approach from day one.

Requirements & Skills

• 10 years of hands-on enterprise systems engineering, infrastructure engineering, or systems administration experience.
• Extensive experience administering Windows Server 2012 R2 through 2022/2025, including in-place upgrades, migrations, and troubleshooting.
• Strong experience with Microsoft SQL Server, including SQL Server upgrades, clustering, and high-availability configurations.
• Hands-on experience with Windows Server Failover Clustering (WSFC), including cluster administration and troubleshooting.
• Advanced knowledge of VMware vSphere, including ESXi, vCenter, and virtual machine administration.
• Strong experience with Microsoft Azure, including virtual machines, networking, and hybrid cloud infrastructure.
• Expertise in Active Directory, Group Policy (GPO), ADFS, and hybrid identity integration with Microsoft Entra ID / Azure AD.
• Proficiency in PowerShell scripting for systems administration, automation, and troubleshooting.
• Experience with Cisco networking, including switching, routing, and network troubleshooting.
• Knowledge of enterprise storage management, DNS, certificate management, and enterprise patching.
• Experience administering Microsoft 365 / Office 365, Exchange, and email spam filtering.
• Working knowledge of Linux server administration.
• Strong troubleshooting, communication, and problem-solving skills.
• Ability to work independently, provide technical guidance, and share knowledge with existing team members.

Responsibilities

• Administer, support, troubleshoot, and upgrade enterprise Windows Server infrastructure.
• Perform Windows Server in-place upgrades, migrations, and infrastructure modernization activities.
• Manage SQL Server infrastructure, including SQL upgrades, Windows Server Failover Clustering, and high-availability configurations.
• Configure and maintain VMware vSphere environments, including ESXi hosts, vCenter, and virtual machines.
• Support Azure infrastructure and hybrid connectivity between on-premises and cloud environments.
• Administer Active Directory, Group Policy, ADFS, and Microsoft Entra ID synchronization.
• Develop and maintain PowerShell scripts to automate infrastructure administration and improve operational efficiency.
• Support Cisco networking, enterprise storage, patching, DNS, and certificate management.
• Troubleshoot complex server, virtualization, networking, authentication, and infrastructure issues.
• Collaborate with systems and networking engineers on infrastructure upgrades, migrations, and technical projects.
• Provide mentoring, technical guidance, and knowledge transfer to the existing infrastructure team.
• Document infrastructure configurations, migration processes, and technical solutions.